Abstract: A cable coupling trandformer having a metal or ferrite member defining separate high permeability portions of a pair of flux paths, a winding electromagnetically associated with each high permeability portion, and a common low permeability portion of each flux path which passes between a pair of conductors carrying equal currents in antiphase. A portion of the current induced in either the conductors or the windings are impressed on the other to create a simple communications device.

Abstract: A full-bridge zero-voltage-switching pulse-width-modulated converter employs a saturable reactor in place of the linear inductor in order to reduce current stress on the active switches, reduce voltage stress on the rectifier diodes, and reduce secondary parasitic ringing. The zero-current-switching full-bridge pulse-width-modulated converter embodiment of the invention contemplates the provision of active switches that are zero-current-switched and passive switches, such as diode switches, that are zero-voltage-switched.

Abstract: In an electrical power conversion system designed to operate on three-phase C voltage generated by a motor generator, a modification is provided to permit the use of a DC power source to operate same. The power conversion system has a plurality of AC-to-DC conversion means for converting the generated three-phase AC voltages. The first specified DC voltage is supplied to a voltage reduction means and the second specified DC voltage is supplied to a control logic circuit of the power source and means, utilizing power from said DC power source, for supplying DC voltages equivalent to the first and second specified DC voltages.